fix: treat empty pull state as open for Tangled MRs

9696     limit: i64,
9797     cursor: Option<&str>,
9898 ) -> Result<Vec<PullRow>, sqlx::Error> {
99+    // Tangled pulls have state='' since state is tracked via separate records.
100+    // Treat 'open' filter as matching '' or 'open' or NULL.
99101     match (state_filter, cursor) {
100102         (Some(state), Some(cursor_ts)) => {
101103             let ts: DateTime<Utc> = cursor_ts
102104                 .parse()
103105                 .map_err(|_| sqlx::Error::Protocol("invalid cursor".into()))?;
104-            sqlx::query_as::<_, PullRow>(
105-                "SELECT did, rkey, repo_did, repo_name, title, body, target_ref, source_ref, \
106-                      source_repo, state, comment_count, created_at, indexed_at \
107-                 FROM pulls WHERE repo_did = $1 AND repo_name = $2 AND state = $3 AND created_at < $4 \
108-                 ORDER BY created_at DESC LIMIT $5",
109-            )
110-            .bind(repo_did)
111-            .bind(repo_name)
112-            .bind(state)
113-            .bind(ts)
114-            .bind(limit)
115-            .fetch_all(pool)
116-            .await
106+            if state == "open" {
107+                sqlx::query_as::<_, PullRow>(
108+                    "SELECT did, rkey, repo_did, repo_name, title, body, target_ref, source_ref, \
109+                          source_repo, state, comment_count, created_at, indexed_at \
110+                     FROM pulls WHERE repo_did = $1 AND repo_name = $2 \
111+                     AND (state = '' OR state = 'open' OR state IS NULL) AND created_at < $3 \
112+                     ORDER BY created_at DESC LIMIT $4",
113+                )
114+                .bind(repo_did)
115+                .bind(repo_name)
116+                .bind(ts)
117+                .bind(limit)
118+                .fetch_all(pool)
119+                .await
120+            } else {
121+                sqlx::query_as::<_, PullRow>(
122+                    "SELECT did, rkey, repo_did, repo_name, title, body, target_ref, source_ref, \
123+                          source_repo, state, comment_count, created_at, indexed_at \
124+                     FROM pulls WHERE repo_did = $1 AND repo_name = $2 AND state = $3 AND created_at < $4 \
125+                     ORDER BY created_at DESC LIMIT $5",
126+                )
127+                .bind(repo_did)
128+                .bind(repo_name)
129+                .bind(state)
130+                .bind(ts)
131+                .bind(limit)
132+                .fetch_all(pool)
133+                .await
134+            }
117135         }
118136         (Some(state), None) => {
119-            sqlx::query_as::<_, PullRow>(
120-                "SELECT did, rkey, repo_did, repo_name, title, body, target_ref, source_ref, \
121-                      source_repo, state, comment_count, created_at, indexed_at \
122-                 FROM pulls WHERE repo_did = $1 AND repo_name = $2 AND state = $3 \
123-                 ORDER BY created_at DESC LIMIT $4",
124-            )
125-            .bind(repo_did)
126-            .bind(repo_name)
127-            .bind(state)
128-            .bind(limit)
129-            .fetch_all(pool)
130-            .await
137+            if state == "open" {
138+                sqlx::query_as::<_, PullRow>(
139+                    "SELECT did, rkey, repo_did, repo_name, title, body, target_ref, source_ref, \
140+                          source_repo, state, comment_count, created_at, indexed_at \
141+                     FROM pulls WHERE repo_did = $1 AND repo_name = $2 \
142+                     AND (state = '' OR state = 'open' OR state IS NULL) \
143+                     ORDER BY created_at DESC LIMIT $3",
144+                )
145+                .bind(repo_did)
146+                .bind(repo_name)
147+                .bind(limit)
148+                .fetch_all(pool)
149+                .await
150+            } else {
151+                sqlx::query_as::<_, PullRow>(
152+                    "SELECT did, rkey, repo_did, repo_name, title, body, target_ref, source_ref, \
153+                          source_repo, state, comment_count, created_at, indexed_at \
154+                     FROM pulls WHERE repo_did = $1 AND repo_name = $2 AND state = $3 \
155+                     ORDER BY created_at DESC LIMIT $4",
156+                )
157+                .bind(repo_did)
158+                .bind(repo_name)
159+                .bind(state)
160+                .bind(limit)
161+                .fetch_all(pool)
162+                .await
163+            }
131164         }
132165         (None, Some(cursor_ts)) => {
133166             let ts: DateTime<Utc> = cursor_ts